Roll for cane mills, crushers, and the like



April 1o, 192s. 1,666,055

lA. DE LA HABA ET AL April 1o, 192s. 1,666,055

A. DE LA HABA ET AL l Filed oct. 4. 192e 2 sheets-snee; 2

l, ,IL M 1^ www@ u .j Pafemdnpr. 10,1923. f f 1,666,055

ALBERT @ein 'H Alinnn nnAsMo' ensuing .onAnseivre;'icomntrificrirr.V

ROLL FORCANEMILLS, ciaUsHn'Rs, Anuman-LIKE.' 7 kAppli-eationsiined octqberzi, ieee. *serial No. wena-,1Q i

Thisinvention relates vto-cane pressing. ap'- tion` of a cane millV installation; "embodying ',paratus, such as canemills` or Crushers hav` four invention;

ying two or more'cooperating Irolls provided i Fig. 2 is lase'ctional view-olf the'crnsl'1:i:ng v

vWith circumferential grooves and-ribs. In rollers;v embodying-'ourinvention; 60

the preferred'forrn of our invention'andpar- F ig. 3 is a fragmentary sectional vieivfof ticnlarly when appliedto sfr-called prelimitlierollersin theth'ree 'rollmillg y j j naryI Crushers Whichyiisnally consist oiipairs` "Figivlis' a longitudinal vievv of the preof cooperating rolls placed inf'advance "of lilninary crushenA 'one`zofftheroll-erg fb'cin'g 'three roll 'mills, thegrolls `may alsobe pro- 'Sll'WIlf'ileleVifO/H -ClhGihG HSQCX; `65

lo vided With longitudinalfgrooves forming Fig'. 5/is1an1enlargedfraginentary vie'xvof `,teeth to'hook into then'cane and draw it into 'the-'crushing' rolls-,'shovvi'ngl'the .i'ormf'and "theTollbij, g .arrangement `ofthe grooves'ftlierein.` o i lIt' has heretofore been suggested to use l'oftlief'dravv'ingswve'have:shown Y yrolls having vboth longitudinal and circuma '130111011 0f an nStallltOnComp-risinga70 ferentialjgrooves inl suchdevices, and our-inpreliniinary'vcrus'her 1305 arranged inadv'ance y l -vention relates t'oia particular-'form andLarof, a three :roll `rnill 11:!It' will She :under-Q'. rangement of roll 'grooving which vvillinstood thatif desired-one orinore additionalv crease the eiiciencyof Vthe installation both ',c'r'usli'ers 'may be fusedin advanceofthe. one

- in the capacity or the amount of cane'ham *showt- 1, and'liliewis'e', .any number/0f threel 75 .Y l

,tlled,` and"i`n the percentage of' juice ei;- jrfoll i'nills may loe `.provided to' follow JAthe gjtractgedfroma given qiiantity of cane kpass- Iflll .11.` Y l f ing through'the;mill.-vf i n 3The'Crusher '10 include-s aroll vstandi-12 f One object of 'Qi'ir invention is toyprovide yarranged `at an inclination, asisJ-nsual, k1so 'va'roll or"cane"mills arranged to obtain an thatpthe canevlpa'ssing :between the crusher so improved gripping action 'upon Athe cane so rolls '13 and M vvi'll'be directed downwardly as' tod'wvk it into the rollbite 'more eiec- O'Tyferwv the g chnte 15 gtothe vlniill.y VThe mill tively 'thanfiS done iny scli'devices l'now' in comprises' the usual th-'ref-irollmill'stand "usefw 4 v Y lfin'lvvhich'arefmoiinted aiA top roll 17', a i Another objectief our invention isto proy@alle Qllf 18; Yand a bagasse'i'oll 19, the vCane 85 vlvide'v cooperatingor mating, rolls for cane andy bagassefrollsbeing arranged "to *me-sh dnills or Crushers, Which.y vvill` have lan -im- AWith-fandy cooperate#With"the` cimelroll` yin n proved shredding action'up'on the cane stalks fra'Wing in the cane'is'talks and expressing 'soas topcause'thecomplete breaking down the jn'i'c'e'theref'rom; l M l i and tearing apartof 'the` stalks inorder that 1 As shovvn more particularly in Figs. -4 and 90 Vthe maximum Vamount'of juice may be exy5j, t`he crushe'r rolls are--pr`ovicledwvithfcir- .l `pressed therefrom. l ciimferential'grooves forming'rihsflthercloej AAk further object of -thefinvention is to tween. These` grooves are not "allffol-f' the provide `cooperating rollsvvhicli` mayv have saine pitch'as is-thecase With rolls noW in f the same .over-all diameter, but which Will use, ibut it Willfbe-'HOCG that 5011i@ arti/relai 95k 4o `have a differentialsurt'ace speed 'between Atively deep ',wvlii=le othersarerelatively'shal-I the vmatingteeth of the cooperating rolls', so low;l and -simila-rlyfthe rilosyv 'formed bysome* as to obtain `anincreased tearing and shredof the 'grooves vvil-l loe-larger .than those l' ding-,action upon the cane,` `formed by others. It isWell tinderl'stood that 'generally .improve the'y grooving of rolls'of the cane into the rolls vtollo'etter advan- Y,this characterso as tofincrease the capacity v tage, ythe smaller and shallovver grooves yand i andthe eftectiveness'of the yentire installa ribsfare better adapted to divide inely'a-nd A still further object of the invention is to `While large and deep `grooves andlribs- Will i0() tionin which the rollsy are used. and also to `rto shred lthefcane andv more effectivelyA eX- provide for the free escape of the 'expressed press" the juice therefrom.A jWitli the far- 105 cane rjuice from the rolls. vrangementshown-inV the f'lrawi'mgs,Wegen` Tothese and other ends the invention contain the advantages of both ylarge and 'small sists in the novelfeatures andcomloination v groovesupon'a single roll." i

, of Partsl to 10e'` hereinafter described and 4In the"pleferlfedk form "of `oiir invent-i011.v

claimed," n

'.55 '.4 In the accompanying drawings;A i shallovv grooves V2O,` .v'form'ingfthe ribs 21* vveprovide' anumloer of groups of relativelyv 110y Fig. l isY aside elevational'viewof apor`*therebetween Theniiinberofthese 'grooves f Y rribs 21.

and ribs in a group, or the number of groups arranged across the length of the roll is not of particular importance in all aspects of the invention, although the present arrangement wherein four of these grooves and three ribs are arranged in a group will be found to be advantageous. It will -be noted that while these grooves are relatively shallow with respect to the apex of the ribs therebetween, they are in reality cut relatively deeply from thesurface of the roll so that the apices of the ribs lie below' the outside surface of the roll. f

Between these smaller grooves and ribs are arranged one or more larger grooves 22, providingribs 23 of coarser pitch thanthe The apices of the ribs 23 lie substantially at the original or outside roll surface, and while the grooves 22 are considerably deeper than the grooves 20, the bottoms ofthese grooves preferably lie slightly above the apices of the ribs 21. In the pre-- ferred. embodiment of our invention there are two of the larger ribs 23 between `each group of the smaller ribs 21. As the ribs 21 lie considerably below the outside roll surface a relatively long inclined tooth surface 23a is provided between the large rib 23 and the adjacent small rib 21, which surface will be of greater area than that adjacent groove 22.

The roll 14C is also provided with longitudinal grooves 24 designed to intersect'the larger ribs'23 and form therewith teeth 25 to hook into the cane and draw it into the roll bite. For ease in manufacture, these grooves are arranged in a single helix along the length of theroll, the angle of the helix preferably being such that the end of one groove is substantially in line with the beginning of the next groove so that some teeth will at all tnnes be 1n engagement with the mass of cane passing therethrough. Prefern ably, these longitudinal grooves are not suiiiciently deep to intersect the ribs 21, so that v the teeth will be provided upon the larger ribs only, leaving the entire surface of the smaller ribs unbroken, so that the maximum amount of juice expressing surface will be provided. Moreover, the teeth 25 will be relatively large so that an effective drawing action upon the mat of cane fed to the rolls will beobtained, it being known that larger` teeth hook into the cane more eectively than smaller ones. f

`Adjacent the ends of the roll beveled or inclined surfaces 26 and 27 are provided, these surfaces being substantially of the same pitch as the sides of the larger ribs so that side lianges will be formed to guide the cane away from the edge of the rolls and prevent any loss of the cane at these points.

The bottom roll 13 of the Crusher is provided with grooves and ribs, which will mate with those arranged in the top roll. For inbetween the coarse and fine ribs.

stance, in this roll the finer grooves are arranged nearer the roll surface and while four grooves 20 and three ribs 21 are arranged in a group in the top roll, the bottom roll will beprovided with four ribs 29 and three grooves 30. Between these `groups of small or fine ribs are arranged larger grooves 31, forming coarse ribs 32 which mate with the ribs 23V and groove 22 ofthe upper roll. Itwill benoted that in the case of the bottoni roll, the coarser grooves and ribs are cut in more deeply from the outside surface of the rolls so that they will properly mate with the corresponding elements of the upper roll, the apex of the rib 32 being slightly below the bottom of, the grooves 30. is shown iuFig. 2, the'lower roll is likewise providedv with longitudinal grooves 33 to provide teeth 34, these grooves being shallower 'than the grooves 24, and are preferably only approximately as deep asthe grooves 30, so that they do not intersect the coarser ribs 32. lt will be apparent that while the coarser 'ribs in one roll, the top roll as shown, are provided with teeth to hook into the cane, the finer ribs of the other roll are the toothed ribs, so that the toothed ribs of one roll cooperate with the unbroken continuous ribs of the matingl roll. With this arrangement, there is no likelihood of the teeth ofone roll mating with the teeth of the other roll, so as to leave'places where the cane will not be acted upon by cooperating surfaces. l

Moreover, itl will be apparent. thatas the apices of the larger ribs in the upperroll lie substantiallyat the original roll` surface, and those of the lower rolllie lsubstantially below the original roll surface, there will be a differential surface speed, between the cooperating ribs, although the rolls'are ofthe same. diameter and are rotated at the saine speed. Likewise, there will be a differential surface speed between the smaller ri s of one roll and the smaller ribs of the adjacent rolls, these ribs in onecase being closer to thesurface of the roll thanA in the llo other' case, as clearly shown `in Fig.4 5.

Moreover, while inthe case of the large ribs the top roll, as shown, will have the greater surface speed, the finer ribs of this roll will have the slower surface speed so that the-differential surface speed between the co-acting surfaces of the two rolls will be reversed Our improved roll grooving isapplicable lfu to the rolls of a three roll mill as well as to 'the rolls of preliminary Crushers, and willr be equally effective in such mills in increasing the extraction and capacity thereof. As shown in Fig, 3 of the drawings, the top roll 17 is grooved in a manner similar to t-he top roll 11i of the Crusher, while the cane roll 18 and bagasse roll 19 are grooved similarly to the lower roll of the crusher so as to mate witlitle 'roll It will,ofcourse, be undfe'rsft'ood1 that this arrangement may be re'- zversedy if` desired, in both Crusher -and `mill,

having the smallergteeth'inay sei-veas the v:upper rolls.

andftherolls lia-ving the larger teeth 25niayy be used as the' lower rolls,whi le the rolls l/Vhile we have 'shown and 'described ai pre- 1 ferred einbodimetofour 'inventiomit willbe, l()y ju'nderstood that the lsame is not limited y'ofthe invent-ion and the scope of the ap-` pended claims.

lfVhat we claim is: 4 1. A rollforcane crushing apparatus, said y A l lrolls, each of said rolls hav-ing twoysets fof ro'll` r'being lprovided with 'Y circumferential groovefs'forming ribs, certain of said ribs being of greater pitch than others.

, 2. Aroll for cane crushing apparatus hav.-

ing circumferential grooves forming ribs, said ribs being arranged in a plurality of series, the ribs of one'series being of greatery i v longitudinal grooves intersectingthe coarse f 1 pitch than the ribs of another series.

3. A roll for cane mills or the "like, having y circumferential grooves forming ribs, there Vbeing a number of-groups of such ribs 'of relatively small pitch, and other ribs ofrelatively large pitch lying between such groups.

4. A roll for cane mills yor the like, having upon its surface a plurality yof groups of ribs of relatively lfine pitch separated by one or more ribs of relatively great pitch.

5. A roll for cane mills or the like, having v r a plurality of groups of circumferential ribs 1 of relatively fine pitch and ribs of relatively f coarse pitch lying between said groups, the` apices of the finer ribs lying nearer theroll `axis than those of the ribs of greater pitch.

6. A roll for cane mills or'the like, having 'a plurality of groups of relatively line circumferential grooves forming ribs of relavtively fine pitch, and circumferential grooves forming teeth'of relatively coarse pitch be tween said groups, the bottoms of the line grooves lying closer to theioll axis than the bottoinsof the coarse grooves.' l

7.` In an apparatus for treatingsugar cane, a roll, having a plurality of groups of circumferential ribs of relatively fine pitch and ribs of'relatively coarse pitch lying between said groups, the apices of the finer ribs ly- 4 ing nearer the roll axisthan those of the ribs Vof greater pitch, and a mating roll for `the first named roll having ribs of both fine and coarse pitch to mate with the ribs of the first named roll, the apices of the finer f ribs being at a greater distance from the roll .axis than those of the coarser ribs.

8. In an apparatus for treating sugar cane,

a roll having a plurality of groups of rela `tively fine circumferential grooves forming ribs of relativelyiinepitch, and circumfer.

ential grooves forming teeth of relatively coarse pitch between said groups, the `bot- '.froin ythe i .roll

toms ofthe iine'grooves closer tothe roll airis-thanthefbot-tofis"offithe'coarse I grooves, vand a matin-g roll having vre'lativel'y line and vnr'relatively coarse grooves"I to-fmat'e "with those-.of tlieffiistn'amed roll, the botfl l,t-o'insz'of the relatively fine groo'vesfbeingjat lgreater "distancegfroi'n the rollf axis tlfian;

ribs being'of `relatively*-fiiie` 'pitchand the'A f other set being of relatively coarse pitch,- and 'the apices of oney set of ribs beifiigfarthe'r f v aXisftlian the :apices of so 'otheifsetf Y.

10. In a'cane mill, a kpair of.. coopera-ting yin'each case than the apices of the other set,

and longitudinal grooves upon each roll, the

ribs upon one troll, land the fine ribsy upon the otherfroll. .y Y

11.2A pairv of mating'rolls for. cane mills or lthe like, each having a setv of ribs of rell ativelyfiiie pitch and a set of ribsof relatively 'coarse pitch, one set of ribs being at al v greaterfdistance from the roll axis than the `otlierfso .as to effect al differential-surface speed betweenthe co-acting 'surfacesof thef ribs of thetwo rolls when the rolls are roytated at the same speed.

ingfapparatus, each of' said rolls having a set of ribs of relatively line pitch,- yand a'set of roll being at a greater distance 'from' the ioll Vaxis than themating ribs` of `the other roll,

so as to effect a differential surface speed bef i tween the'cooperating rolll surfaces when the f l rolls arerotatedat the saine speed. f y `13.v A roll for canemills'or the like, having a set of ribs of ,relativelyl linepitch, and

` a set of ribs of relatively coarse pitch, the

apices of the foriner being closer to the rolll aXis than the apices ofthe latter, there bic-7 'iio ing ribs of relatively fine pitch ateach end T15 of the rolland lsaid roll havingl inclined end flanges to Vter.

'14. A roll ing aJplurality-of groups lof ribs lof relatively fine pitch, and ribsuof` ,relatively coarse pitch between said groups, the ribs of rela* tively fine pitch being closer to the aXis ofl the rollthan the otherv ribs, and there being a group of such ribs adjacent each end of the roll, and a relatively deep inclined' fiange at each end of the roll adjacent each end group of relatively fine ribs to guide'the cane away from the i'oll ends. i y

15.v A pair of rolls for cane'crushing appaguide the cane toward the roll ceni l 100, I l2. A pair of mating rollsfor cane crush-k` fine pitch provided With teeth tohook into the cane, and a series of unbroken continuous ribs of relatively coarse pitch.

16. In cane crushing apparatus, a Vpair of mating rolls, each of said rolls having a set of grooved ribs forming teeth to hook into the cane, and a set'of continuousunbroken ribs, the V,'rooved ribs of one roll mating and :3o-operating With the continuous unbroken ribs of the otherroll.

17. In a cane crushing apparatus, a pair of mating rolls, one of said rolls havinga sveries of ribs of relatively line pitch, the apices of which are disposed substantially at the outside rollsurface, and a series of ribs of relatively coarse pitch, the apicesv of Which are disposed substantially below the outside roll surface, the other roll being` provided with ribs of both fine and coarse pitch to vmate with those ofthe first roll, the apices ofthe ribs of line pitchof the second roll i lying substantially` below they outside roll j surface, and the apicesof the ribs of coarse `pitch lying substantially at the outside roll surface. l

In Witness whereof, We havehereuntoset our hands this 1st day of Gct., 1926.

' ALBERT DE LA vHBA.

ERASMO GARCIA. 

